Dear Editor, Globally, approximately two billion people suffer from micronutrient deficiencies (Tulchinsky, 2010;Myers et al., 2014). Soil micronutrient availability is of great importance for the evaluation of soil fertility and the determination of appropriate measures for improving crop quality and hu-man health. The diethylenetriamine-penta-acetic (DTPA) extraction method is used for the simultaneous measurement of available iron (Fe), manganese (Mn), copper (Cu), and zinc (Zn) in near-neutral and calcareous soils (Lindsay and Norvell, 1978), and the procedures involve soil preparation, grinding, and extraction. The grinding of air-dried soil sam-ples and sieving the samples through a 2-mm mesh sieve are commonly recognized as'standard procedures' around the world (Carter and Gregorich, 2008). However, most Chinese laboratories use ground soil samples that are passed through a 1-mm mesh, referring to the methods in Soil and Agricultural Chemistry Analysis (Bao, 2008), as mentioned in some articles (Wei et al., 2006;Zhao et al., 2014;Wang et al., 2017;Zhang et al., 2017). Unfortunately, the use of the 1-mm sieving method is often considered controversial, and many researchers prefer using 2-mm sieving (Huang et al., 2019). Additionally, soils passed through a 1-mm mesh have generally been used for storage after relevant chemical analyses in China. This limits the interpretation of results obtained from China and their comparison to those from other countries, since soil sample handling might profoundly influence the measured values of these micronutrients (Carter and Gregorich, 2008).

Tingmiao HUANG;Yixuan WANG;Xinji RU;Sicen LI;Shaowei MA;Lihua BAI;Qiannan HUANG;Xiaohan LI;Zhaohui WANG

State Key Laboratory of Crop Stress Biology in Arid Areas,Northwest A&F University,Yangling 712100(China);College of Agriculture,Shanxi Agricultural University,Taigu 030801(China);Key Laboratory of Plant Nutrition and Agri-Environment in Northwest China,Ministry of Agriculture/College of Natural Resources and Environment,Northwest A&F University,Yangling 712100(China)

土壤圈（英文版）

[1]Tingmiao HUANG;Yixuan WANG;Xinji RU;Sicen LI;Shaowei MA;Lihua BAI;Qiannan HUANG;Xiaohan LI;Zhaohui WANG-.Can sieving size affect the determination of soil available micronutrients?)[J].土壤圈（英文版）,2022(03):503-506

Globally,Tulchinsky,Norvell,Gregorich

Can,sieving,size,affect,determination,available,micronutrients,Dear,Editor,approximately,two,billion,people,suffer,from,deficiencies,Myers,Soil,availability,great,importance,evaluation,fertility,appropriate,measures,improving,crop,quality,hu,health,diethylenetriamine,penta,acetic,DTPA,extraction,used,simultaneous,measurement,iron,manganese,Mn,copper,zinc,near,neutral,calcareous,soils,Lindsay,procedures,involve,preparation,grinding,air,dried,samples,through,mesh,sieve,commonly,recognized,standard,around,world,Carter,However,most,Chinese,laboratories,ground,that,passed,referring,methods,Agricultural,Chemistry,Analysis,Bao,mentioned,some,articles,Wei,Zhao,Wang,Zhang,Unfortunately,often,considered,controversial,many,researchers,prefer,using,Huang,Additionally,have,generally,been,storage,after,relevant,chemical,analyses,China,This,limits,interpretation,results,obtained,their,comparison,those,other,countries,since,handling,might,profoundly,influence,measured,values,these

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